Raker-tooth swager.



R. J. BROUGH.

BAKER TOOTH SWAGER.

APPLIOATION FILED Nov. 11, 1907. RENEWBD 21:13.21. 1911.

Patented Mar. 31, 1914 man,

UNTE

ROBERT J. BROUGH, OF TACOIVIA, WASHINGTON.

BAKER-TOOTH. SWAGER.

Specication of Letters Patent.

Patented Mar. 31, i914.

Application filed November 11, 1907, Serial No. 40L563. Renewed February21, 1911. Serial No. 609,994;

To all whom t may concern:

Be it known that I, ROBERT J. Bnouori, a citizen of the Dominion ofCanada, residing at Tacoma, in the county of Pierce and State of"Washington, have invented certain new and useful improvements in Raker-Tooth Swagers, of which the following is a specification, referencebeing had therein to the accompanying drawing.

This invention relates to devices for swaging the planing` teeth ofcross-cut saws and has for its object to produce and maintain, by meansof swaging, planer teeth of such shape that they cut shavings from thebottom of the kerf, instead of breaking up` the wood into saw-dust, thuskeeping the kerf clean and enabling the saw to do more elficient work asnone of its energy is applied to breaking up the wood. I attain thisobject by the devices and mechanism illustrated in the accompanyingdrawing, in which;

Figure l is a front elevation of my swager; Fig. 2 is a side elevationthereof; Fig. 3 is a horizontal section thereof on the lines 3-3 inFigs. l and 2; Fig. 4 is a rear view thereof; Fig. 5 is a side view of apart of the handle; Fig. 6 is a plan of the clamping washer; and Fig. 7is a view showing the shape of the swaged planer tooth.

Similar numerals of reference refer to similar parts throughout theseveral views.

This device is designed to change the shape of a raker tooth from thatshownin dotted lines (Fig. 7) to that shown in full lines in Fig. 7without in any manner inj uring its cutting points or taking anymetalfrom the tooth, and also to restore worn teeth to their proper shape.The object is accomplished by compressing the metal along the inneredges of the V-shaped part of the tooth'thus lengthening the said edgesand pushing the points outward so that its outer edges will be curved asshown in said Fig. 7, and this compressing action takes place within thearea marked A in said ligure. The object in forming a planer tooth inthe above mentioned shape is to make a tooth which shall coact with thekerf side-cutting teeth and shall plane out all the wood on the bottomof the kerf, and shall so act on the wood as to prevent the saw fromhaving either a jumping action on the wood or digging too deeply in thewood, and which will truly cut the wood in conjunction with the otherteeth. Since the metal out of which the saw teeth are made is of a veryhigh and line degree of temper and since the prongs are to be radicallybent by the blows of the hammer it is necessary that great care beexercised both in the design, construction and operation of my device.rlhe swage block is made preferably in two pieces l and 2, the part lforming the body of the swager and the part 2 being the actual swagingtool which receives the blow of the hammer and transmits it to thedouble inwardly-acting compressing wedges formed thereon which engageand squeeze the inner edges of the V-shaped part of the tooth. Theeffect of the blow is twofold, first the prongs are sprung thereunderand also, at the same time, the inner edges are lengthened by thesidewise compressive action of the double inwardly-acting wed ges. Thefirst effect aids the second effect while the secondmakes the lirstelfect permanent so that the prongs will not return to their originalposition. rlhe slot 3 of the part 2 which acts thus on the tooth is cuttherein so that its center is lower than its edges and the sides 4 ofthis slot 3 converge toward the top of the slot to form a doubleinwardly-acting or squeezing wedge, and further these sides are closertogether at the center than at the edges. The upper portion of the part2 is adapted to receive the blow of the hammer. rlhe part 2 is fittedinto the part 1 very tightly so that the two form practically one piece.

The part l is provided with a back extension 5, rectangular in form, andcarrying the bracing pins and the leveling set screws. rlhe two bracingpins are best illustrated in Fig. 3 and are formed with main cylindricalparts 6 fitting neatly in, and adapted to slide in, the holes 7 in thepart 5. They are provided with eccentric bracing lugs 8 on one end, thelugs 8 being symmetrically but oppositely formed. The lugs 8 are adaptedto engage the sides of the raker tooth when the bracing pins areextended forward but to be withdrawn therefrom when the pins are intheir inoperative position. lin Fig. 2 the pins are shown in theirinoperative position and in Fig. 3 they are shown extended forward toengage the sides of the raker tooth. The pins are also provided withcylindrical parts 9 to the rear of the part-s 6 and of smaller diameterto keep them from falling out at the back of the tool, and withscrew-threaded parts 10 at their rear ends. The parts 10 are flattenedon two sides as illustrated in Fig. 6. The pins are operated as to theirlongitudinal positions by means of a handle 11 which engages a yoke 12to which the screw-threaded parts 10 are secured through the medium ofthe washers 13 and the nuts 14. The connection between the handle 11 andthe yoke 12 is illustrated in Fig. 5 wherein is shown a part 15, joiningthe t-wo halves of thel yoke, within a cavity 16 in the handle, the part15 being partly cylindrical and partly flattened so that the handle maybe disconnected therefrom when desired. The handle 11 is formed with afulcrum part at its lower end adapted to engage under the loop 17secured to the part 5 so that when the upper end of the handle isgrasped(by the same hand holding the part 2 of the swager) the yoke will bepressed forward and the lugsl 8 forced out into operative position oneach side of the tooth. The pins are further adjusted as to theirangular positions (so that the eccentric lugs 8 may be brought to theirproper dis-y tance apart) by the washers 13 which engage the Hattenedparts of the screw-thread: edparts 10 so that by turning the washers thepins, and therefore the lugs 8, are turned. The washers 13 are held inany sired position by means of the bevelheaded screws 18 engaging them.rlhe nuts 14 do not prevent the rotation of the pins. The pins areillustrated in the drawings for use with a thick saw, but if a thin sawis to be swaged it will pass up higher into the swagingslot 3 so thatthe pins will be relatively lower. To overcome this I have so shaped thelugs 8 of the pins' that, if the pins are interchanged, the bearingpoints of the lugs will come much higher than in the poe sitionillustrated and therefore in about the same relative position withregard to the tooth being swaged. rlhe set screws 19 in the corners ofthe part 5 are adapted to be screwed in or out from the said part 5 sothat' their ends will engage the saw being swagedk and will keep thetool part 2 vertical so that theblow thereon will not bend the tooth.sidewise n My invention is operated as follows: The Saw being properlysupported so that its teeth are uppermostand are vertical, the

below the point where the prongs are to be bent. Then the part 2 isgiven a few blows with a suitable hammer, the handle 11 is released'a-ndwithdraws the lugs 8 from the tooth, and the swager is lifted olf thetooth. As a rule about four to six firm but not too heavy blows of thehammer will be sufficient to bend the prongs into the desired positions.

Having described my invention, what I claim is:

1. In a mechanism for swaging double pointed raker teeth, a swaging diehaving a slot formed with an end wall conve-Xly rounded longitudinally,the side walls of the slot converging toward the end wall.

2. In a mechanism for swaging double pointed raker teeth, a swaging diehaving. a slot formed with an end wall conveXly rounded longitudinally,the sides of the slot converginginward toward each other, theconvergence at the middle portion of the slot being greater than at theends of the slot whereby to Y engage, compress and lengthen the innerside edge of a raker tooth. a

3. In a raker tooth-swager, a swagingdie formed with a swaging surfacehaving upwardly and outwardly inclined sides, Vand bracing pins disposedone on each side of Vt-he die and opposed to the same and adapted toengage and supportthe side edges of the raker tooth below the partthereof being swaged by said die. 4

el. In a raker tooth swager, the combination with a body, of a swagingsurface formed thereon, two complementary bracing pins movably mountedin Said body at right angles to the swaging surface and adapted toengage each side of the raker tooth be- *low the part thereof beingswaged, and a handle engaging both of said bracing pins to move-theminto or out of their operative positions.

5. In a raker tooth swager, 'the combination with a body, of a swagingsurface formed thereon, two complementary bracling pins movably mountedin said body at right angles to the swaging surface, each of 'said pinsbeing eccentrically mounted and rotatably adjustable relatively to eachother and adapted to engage each side of the raker tooth below the partthereof being swaged, a handle engaging both of said bracing pins tomove them into or out of their operative positions, and means forholding them in their rotatably adjusted positions.

6. A saw swage having a lvertically.movable swaging die havinga slotlformed with a convexly rounded end wall providing an outwardly actingVswaging'V surface, and means carried by the swage and coacting withsaiddie engageable with the ,sidef edges of a saw tooth for both bracing thetooth and confining the swage with its swaging surface in properrelation to the tooth.

7. A saw swage including a movable die and complemental spaced memberscarried by the swage below the die and coacting with the die, saidmembers being spaced from each other to engage the side edges of a sawtooth to brace the tooth during the swaging operation and being disposedon either side of the aXis of movement of the 8. A swaging device forthe ralrer teeth of saws including a die having a conveXly roundedswaging groove and complemental spaced members carried by the swagecoacting with and disposed opposite to said grooved face of the swagingdie for engaging the opposite side edges of a saw tooth and supportingthe same in opposition to the swaging die, said members beingadjustable.

9. A saw swage including a die having a swaging groove and spacedrotatable members carried by the swage and disposed below and on eitherside of the axis of the path of movement of the swaging die and adaptedto engage opposite side edges of the saw tooth and support said toothwhile it is being swaged in opposition to the swaging die.

10. A saw swage including a medially disposed die having a swagingsurface, supporting means carried by the swage and coacting with theswaging surface for engaging a saw tooth, said means being disposed oneach side of the die and opposed to the same and being movable into andout of operative position, and means for moving the aforesaid means intoand out of operative position.

11. A swage for swaging raker teeth including a longitudinally shiftableswaging die, spaced members movably supported on the swage and opposedto said die, said members being disposed one on each side of the die andadapted to engage the edge of the raker tooth, and means forsimultaneously moving said members into and out of supporting positionwhere they will engage with the side edges of the tooth.

12. A saw swage having a movable swaging die formed with a roundedswaging surface, complemental spaced tooth-supporting members carried bythe swage disposed one on each side of, and opposed to, said die andadapted to enga-ge the side edges of the saw tooth being swaged, andmeans for permitting said members to be adjusted relative to each otherand to the swaging surface.

13. A mechanism for swaging raker teeth and including a die having aswaging surface, an eccentric member rotatably mounted and coacting withthe swaging surface for engaging a saw tooth with which the swaging dieengages, and means for securing the member in different rotatablyadjusted positions.

14. A saw swage including a swaging die., complemental members adaptedto engage the opposite side edges of a saw tooth with which the die isin engagement, said complemental members being adjustable toward or fromthe die, and means connecting the members to cause the same to beadjusted together.

15. A swage for raker teeth including a swaging die, complementalmembers coacting with the swaging die and disposed on each side of andopposed to the same, said complemental members being adapted to engage asaw tooth, means for shifting the complemental members into and out ofposition to engage the saw tooth, and means for permitting the membersto be adjusted relatively to each other and the swaging die.

16. A device for swaging raker teeth including a die having a swagingsurface, oppositely disposed tooth-supporting means opposed to the dieand disposed one on each side of the same, said supporting means beingshiftable into and out of position in line with the swaging die, and alever for shifting said means into and out of such operative position.

17. A saw swage including a swaging die formed at one end with a convexswaging face, a member within which the swaging end of the die issupported, said member eX- tending beyond and at one side of saidswaging face, and a pair of complemental supporting members movabletransversely through the extension and adapted to engage a saw tooth,said members being disposed laterally on each side of a line coincidentwith the axis of movement of the die and being opposed to the swagingface of the die, said members being movable transversely through theextension and being eccentrically disposed.

18. A saw swage formed with a swaging slot, the side walls of whichconverge toward the bottom of the slot to constitute a pinching angle,the said angle gradually increasing in degree from the middle portion ofthe slot toward each end thereof.

19. A saw swage formed with a swaging slot, the bottom wall of which iscurved in the direction of the length of the slot, the side walls of theslot converging toward the said bottom wall to constitute a pinchingangle, the said angle gradually increasing in degree from the middleportion of the slot toward each end thereof.

20. A mechanism for swaging double pointed raker teeth including aswaging die having a slot formed in the swaging face thereof, said slothaving a eonvexly rounded inner end Wall, the sides of the slot beingconvergent inwardly, a pair of spaced oomplemental tooth supportingmembers disposed on each side of the axis of movement' of the said die,each of said members having the form of a pin With a head eccentric tothe axis of the pin, seid members being interchangeable to raise or VIntestimony whereof Iax my signature in presence of two Witnesses.

ROBERT J. BEOUGH.

Witnesses:

E. D. HODGE, C. VH. EVERETT.

Copies of this patentmay be obtainedv for five 'centsieach, byaddressing' the Commissioner o! PatentL \Washington, D. C.

